Lifting device



(No Model.) 2 SheetsSheet 2.

O. T. JENSEN.

LIPTING DEVICE.

Patented Sept. 15, 1896 Ole/I1 Jiensen; By All S J lflongz ys.

UNITED I STATES PATENT Orricn,

OLE T. JENSEN, OF XVEATHERFORD, TEXAS.

LIFTING DEVICE.

SPECIFICATION forming part of Letters Patent No. 567,681, dated.September 15, 1896. Application filed January 31, 1896. Serial No.577,588. (No model.)

To all whom it may concern;

Be it known that I, OLE T. JENsEN, a citizen of the United States,residing at eatherford, in the county of Parker and State of Texas, haveinvented a new and useful Lifting Device, of which the following is aspecification.

My invention relates to lifting devices, and particularly to themechanism adapted for use as a stump-puller and for elevating heavyweights, the object in-view being to provide a simple and efficientconstruction and arrangement of parts whereby sufficient power forelevating heavy weights may be communicated to a rotary shaft or drum,and Whereby the means communicating motion to the drum may be moved outof operative position and a brake simultaneously applied in order torelieve the operating-lever from strain when the mechanism is at rest.

Further objects and advantages of this invention will appear in thefollowing description, and the novel features thereof will beparticularly pointed out in the appended claims.

111 the drawings, Figure 1 is a perspective view of a lifting deviceembodying my invention, the parts being shown in operative position.Fig. 2 is a longitudinal section of the same, showing the pawls thrownout of operative relation with the ratchet-teeth of the driving-wheel.Fig. 3 is a transverse section taken in a plane indicated by the line 3of Fig. 2.

Similar numerals of reference indicate corresponding parts in all thefigures of the drawings.

The combined supporting-frame and truck comprises side bars 1, connectedat their front and rear ends by cross-bars 2 and 3 and at anintermediate point by a cross-bar 4, and depending from the side barscontiguous to their front ends are front and rear legs or standards 5and 6, upon the latter of which are mounted supporting-wheels 7. Thefront and rear legs or standards at each side of the frame are connectedby longitudinal braces 8 and the bracket-braces 9, and said legs orstandards are further connected in pairs by transverse braces 10, whichare detachable at one end to provide for their disconnection to allowthe frame to be arranged over a at one side of the frame and arehook'shaped at the other end to engage staples or keepers 12 upon thelegs or standards at the other side of the frame. A handlebar 13 issupported by hangers 14 from the rear side of the frame to enable theoperator to move the machine from place toplace, as required.

Mounted in longitudinally-alined guides 15 upon the cross-bars 2 and ais a slide 16, which is longitudinally slotted, as shown at 17, to allowmovement of the slide without interference with aperipherally-ratchet-toothed driving-wheel 18,- secured to the center ofa transverse shaft or drum 19, said shaft or drum being mounted inbearings 20 on the side bars of the frame. Fixed to the shaft or drumupon one side of the plane of the driving-wheel is a spool 21, adaptedfor raising objects of small or medium weight, a cable being attachedthereto, and secured at one end to the shaft or drum upon the other sideof the plane of the operating-wheel is a lifting-chain 23, at a pointbetween parallel guide-plates 24:, arranged, respectively, upon thecontiguous side bar of the frame and an auxiliary bar 25, which isparallel with said side bar.

Mounted 011 a bracket 26, projecting forwardly from the cross-bar 3, isan operating or hand lever 27, the upper end of which is connected withthe rear end of the sliding plate by means of a pitman 28, wherebyreciprocatory movement. of the plate may be produced by oscillation ofthe operating-lever. Pivotally mounted upon the sliding plate at itsopposite extremities and arranged,

respectively, above and below the plane of said plate are theoperating-pawls 29and 30, the same being longitudinally slotted to formparallel guide-arms29 and 30,which are arranged, respectively, uponopposite sides of the plane of the operating-wheel to prevent lateraldisplacement of the engaging extremities of the pawls. The upper pawl29,which is mounted upon the rear end of the sliding plate, is held bygravity in operative relation with the teeth of the pawl, and the lowerpawl 30, which is disposed at its free end to engage the teeth at thelower side of the wheel, is held in operative position by means ofweights 31, secured to lateral studs 32, formed by a T-head extension ofthe pawl 30 above its pivotal point. In the construction illustratedsaid weights are formed on the front extremities of trip-arms 33, andthe rear extremities of said trip-arms are loosely connected to theopposite sides of the upper pawl 29 by means of links 34 to allowmovement of the pawl 30 independently of the pawl 29.

Mounted upon the pitman 28 at an intermediate point is a trip-lever 35,which in the construction illustrated is of bell-cran k shape, and theupper arm of this lever is connected by means of a link 36 with the pawl29 at an intermediate point, whereby downward movement of the free endof the lever draws rearwardly upon the pawl 29 and upon the T- headextension of the pawl 30 to disengage said pawls from the teeth of theoperatingwheel, as indicated in Fig. 2.

In connection with the above-described construction lvalso employ abrake having a shoe 37 pivotally connected to the sliding plate at itsrear end by means of ears 38, and having an extension 39, which isconnected by side links 40 to the pawl 29 at an intermediate point. Asthe pawls are disengaged from the operating-wheel by the depression ofthe rear free end of the trip-lever 35 downward pressure is communicatedthrough the side links 40 to the rearward extension of the shoe, andhence the front extremity of the shoe is brought into engagement with aratchet-tooth of said wheel to lock the latter against backwardrotation. In this way the operatinglever is relieved of strain when themechanism is at rest, said brake being brought into operative relationwith the Wheel simultaneously with the disengagement of the operating-pawls.

Connected to the lifting-chain is a grappling device 41, which in theconstruction illustrated consists of a plurality of grapplinghooks 42,loosely connected by means of links 43 with a ring 44, suitably securedto the extremity of the chain.

Various changes in the form, proportion, and the minordetails ofconstruction may be resorted to without departing from the spirit orsacrificing any of the advantages of this invention.

Having described my invention, what I claim is 1. In a lifting device,the combination with a supporting-frame, of a slidable plate, aratchet-toothed operating-wheel secured to a shaft or drum,oppositely-disposed pawls arranged in operative relation with said wheeland mounted upon the slidable plate, and means for communicatingreciprocatory movement to the plate, substantially as speci- 2. In alifting device, the combination with a supportingframe and a shaft ordrum mounted thereon, of a ratchet-toothed operating-wheel fixed to theshaft or drum, a slidableplate mounted upon the frame, upper and lowerpawls mounted upon the plate and arranged at their free ends inoperative relation with the toothed periphery of the wheel, said pawlsbeing longitudinally slotted to form parallel guide-arms arranged uponopposite sides of the plane of the wheel, and means for communicatingreciprocatory movement to the plate, substantially as specified.

3. In a lifting device, the combination with a supporting -frame, and ashaft or drum mounted thereon, of a peripherally-toothed operating-wheelfixed to the shaft or drum, oppositely-disposed pawls mounted upon theslidable plate and arranged at their free ends in operative relationwith the periphery of said wheel, trip-arms connecting the pawls forsimultaneous movement, whereby the pawls may be simultaneouslydisengaged from the wheel, a trip-lever operatively connected with oneof the pawls, and means for communicating reciprocatory movement to theslidable plate, substantially as specified.

at. In a lifting device, the combination with a supporting-frame, and ashaft mounted thereon, of a peripherally-toothed operatingwheel fixed tothe shaft or drum, a slidable plate, and means for communicatingreciprocatory movement thereto, said means includ ing an operating orhand lever and a pitman connecting the hand-lever to the plate,oppositely-disposed pawls pivoted to the plate and arranged at theirfree ends in operative relation with said wheel, trip-arms connectingthe pawls for simultaneous movement, a triplever mounted upon saidpitman, and a link connecting the trip-lever to one of the pawls,substantially as specified.

5. In a lifting device, the combination with a supportingframe and ashaft or drum mounted thereon, of a peripherally-toothed operating-wheelfixed to the shaft or drum, a slidable plate, and means forcommunicating reciprocatory movement thereto, upper and loweroppositely-disposed pawls 29 and 30 mounted upon the plate and arrangedat their free ends in operative relation with said wheel, the lower pawlbeing extended beyond its pivotal point, weights mounted upon theextension of saidlower pawl, trip-arms attached at one end to saidweights and loosely connected at the other end to the upper pawl, and atrip-lever operatively connected with the upper pawl, substantially asspecified.

6. In a lifting device, the combination with a supporting frame and ashaft or drum mounted thereon, of a peripherally-toothed operating-wheelfixed to the shaft or drum, a slidable plate, and means forcommunicating reciprocatory movement thereto, upper and 7. In a liftingdevice, the combination with,

a supporting frame and a shaft or drum mounted thereon and carrying atoothed operating-pawl, of a slidable plate, and means for communicatingreciprocatory movement thereto, connected pawls mounted upon the plateand arranged at their free ends in op erative relation with said wheel,trip devices connected to one of the'pawls and adapted when operated todisengage both pawls from the operating-wheel, a pivotal brake-shoemounted upon the plate and provided beyond its fulcrum with anextension, and links connecting the contiguous pawl with the extensionof the brake-shoe, whereby when said pawls are disengaged from theoperatingwheel the brake-shoe is thrown into operative engagementtherewith, substantially as specified.

8. In a lifting device, the combination of a frame having front and rearlegs or standards and provided at the lower extremities of its rear legsor standards with supporting-wheels upon which the frame may be balancedand transported, adjustable transverse front and rear braces connectingthe transversely-opposite legs or standards and detachably connected atone end to allow the frame to be moved horizontally over an object to beelevated, a transverse shaft or drum mounted I

